EP1575790A1 - Method for indirectly identifying the loss of pressure on a motor vehicle wheel - Google Patents
Method for indirectly identifying the loss of pressure on a motor vehicle wheelInfo
- Publication number
- EP1575790A1 EP1575790A1 EP03789198A EP03789198A EP1575790A1 EP 1575790 A1 EP1575790 A1 EP 1575790A1 EP 03789198 A EP03789198 A EP 03789198A EP 03789198 A EP03789198 A EP 03789198A EP 1575790 A1 EP1575790 A1 EP 1575790A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wheel
- acceleration
- acc
- wheel acceleration
- vehicle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000001133 acceleration Effects 0.000 claims abstract description 28
- 238000004590 computer program Methods 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 11
- 238000011156 evaluation Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/06—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle
- B60C23/061—Signalling devices actuated by deformation of the tyre, e.g. tyre mounted deformation sensors or indirect determination of tyre deformation based on wheel speed, wheel-centre to ground distance or inclination of wheel axle by monitoring wheel speed
Definitions
- the present invention relates to a method for indirect pressure loss detection on a motor vehicle wheel, and a computer program product according to claim 10.
- DE 100 44 114 AI describes a further method and a device for detecting a loss of pressure in tires in motor vehicles with a plausibility check.
- the reference values determined in this document for the detection of a pressure loss are checked by the plausibility check in order to avoid or minimize false warnings.
- WO 2000006433 AI describes a method for rough road detection which is used for vehicle speed control.
- a disadvantage of these known indirect pressure loss detection methods is that these methods always build on deviations of the individual wheels from one another, so that a pressure loss on more than one tire is not always recognizable. In particular, the detection of pressure losses on several or all tires is not always possible.
- the wheel acceleration is preferably observed for all four wheels within a predetermined time and deviations in the wheel acceleration are evaluated.
- the wheel acceleration is preferably only evaluated when certain driving maneuvers or driving conditions are present.
- Straight-ahead driving is regarded as a particularly preferred driving state.
- a straight-ahead drive is preferably detected by evaluating driving parameters such as lateral acceleration of the vehicle, longitudinal acceleration of the vehicle, yaw rate, wheel moments, etc. These driving parameters can be measured using sensors or calculated from other variables. Some of these driving parameters can be queried by a vehicle data bus (CAN), where they are also available to other systems such as an anti-lock braking system (ABS) or a traction control (TCS) or an electronic stability program (ESP).
- ABS anti-lock braking system
- TCS traction control
- ESP electronic stability program
- the wheel acceleration is only evaluated from a minimum vehicle speed.
- the wheel acceleration is preferably only evaluated if the driving parameters are below certain limit values which describe driving straight ahead.
- a difference is preferably formed for each vehicle wheel from the minimum and the maximum of the wheel acceleration. It is further preferred that instead of the difference, the amount or only the positive or negative acceleration values of maximum and minimum are formed and evaluated.
- a reference value is preferably formed from the difference of each individual vehicle wheel, which very particularly preferably represents an arithmetic mean value of the difference over a time T1 or a filtered value of the difference.
- This filtered value is preferably obtained from first-order filtering.
- the limit value THRESH 1 is preferably determined as a function of the wheel torque applied to the vehicle wheel. Different limit values THRESH 1 are particularly preferably set for a driven axis and a freely rolling axis.
- a warning to the vehicle driver is preferably suppressed when a vehicle wheel has exceeded the limit value THRESH 1 and at least one further vehicle wheel has exceeded a second limit value THRESH 2.
- the method according to the invention is preferably used together with a known indirectly measuring tire pressure monitoring system (DDS) and / or a known directly measuring tire pressure monitoring system (TPMS), this only for supplementary consideration or improvement of known indirectly measuring tire pressure monitoring system (DDS) and / or a known directly measuring Tire pressure monitoring system (TPMS) is used. Further features and advantages of the method according to the invention emerge from the subordinate claims. The invention is described with reference to the three figures. The figures show:
- Fig. 2 shows the wheel torque over the vehicle speed
- Fig. 3 shows the Difference Sample_acc over time.
- curve 1 shows a possible course of the wheel acceleration a Ra d of a vehicle wheel over time t.
- the wheel acceleration a wheel is observed over time intervals TO and a difference Sample_acc is formed, which consists of the maximum maxi and the minimum mini of each Rades i exists within this time interval TO.
- a reference value Ref_DIFF for the wheel acceleration a Ra d of each individual wheel i is determined and stored over a time Tl which comprises a plurality of time intervals TO.
- the wheel torque M of a vehicle wheel is plotted against the vehicle speed v. Since the vehicle speed v is dependent not only on the wheel torque M but also on other parameters such as the coefficient of friction between the road and the tire, so-called wheel torque ranges are formed, as shown by curves 2 and 3. For each vehicle speed v, the wheel torque ranges describe a valid range in which a wheel torque M of an intact vehicle wheel can lie. If a wheel torque M lies at a vehicle speed v outside the valid range, this indicates that there is, for example, a tire defect.
- Curve 2 describes the valid wheel torque range of a driven vehicle wheel above vehicle speed v
- curve 3 describes a typical course of the wheel torque range of a rolling or non-driven vehicle wheel of a driven axle above Vehicle speed v represents.
- This method can be used both for a vehicle with one driven axle and for a vehicle with two driven axles.
- the wheel torque distribution is calculated depending on the degree of locking. This is either on the vehicle data bus (CAN), or can be calculated from the wheel speed differences z.
- CAN vehicle data bus
- the difference Sar ⁇ ple_acc of the wheel acceleration a wheel is plotted against time t in FIG. 3.
- 3a shows a possible course of a difference Sample_accl of a wheel over time t without exceeding a limit value THRESH 1 or THRESH 2.
- the difference Sample_acc2 of a wheel represented by curve 5 exceeds the limit values THRESH 1 and THRESH 2.
- a difference Sample_acc3 of one wheel represented by curve 6 likewise exceeds the limit values THRESH 1 and THRESH 2
- a difference Sample_acc4 of another wheel, represented by curve 7 only exceeds the limit value THRESH2.
- a selection of driving maneuvers is defined which allow an evaluation (e.g. all DDS-relevant driving maneuvers such as straight-ahead driving).
- a straight-ahead drive is recognized by evaluating driving parameters such as lateral acceleration, longitudinal acceleration, yaw rate, wheel moments, etc.
- driving parameters can be sensed, calculated from other parameters or queried by a vehicle data bus (CAN), where these driving parameters are already made available or used by other systems such as an anti-lock braking system (ABS), a traction control (TCS) or an electronic stability program (ESP) ,
- ABS anti-lock braking system
- TCS traction control
- ESP electronic stability program
- the limit values THRESH 2 can be set individually or in pairs for each wheel, in each case the driven or the non-driven wheels. Furthermore, separate selection criteria for THRESH1 are set depending on whether a moment is currently applied to this wheel or not.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
- Measuring Fluid Pressure (AREA)
- Regulating Braking Force (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10259201 | 2002-12-17 | ||
DE10259201 | 2002-12-17 | ||
PCT/EP2003/013987 WO2004054824A1 (en) | 2002-12-17 | 2003-12-10 | Method for indirectly identifying the loss of pressure on a motor vehicle wheel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1575790A1 true EP1575790A1 (en) | 2005-09-21 |
EP1575790B1 EP1575790B1 (en) | 2007-08-08 |
Family
ID=32519054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03789198A Expired - Lifetime EP1575790B1 (en) | 2002-12-17 | 2003-12-10 | Method for indirectly identifying the loss of pressure on a motor vehicle wheel |
Country Status (4)
Country | Link |
---|---|
US (1) | US20060220811A1 (en) |
EP (1) | EP1575790B1 (en) |
DE (1) | DE50307910D1 (en) |
WO (1) | WO2004054824A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004049315B4 (en) * | 2003-12-09 | 2020-10-22 | Continental Teves Ag & Co. Ohg | Method for the improved detection of a deflated vehicle tire in an indirectly measuring tire pressure monitoring system |
DE102005018697A1 (en) * | 2004-06-02 | 2005-12-29 | Daimlerchrysler Ag | Method and device for warning a driver in the event of leaving the traffic lane |
DE102005042061A1 (en) * | 2004-10-05 | 2006-04-13 | Continental Teves Ag & Co. Ohg | Method for tire pressure monitoring in a motor vehicle |
DE102006032212A1 (en) * | 2005-08-18 | 2007-03-08 | Continental Teves Ag & Co. Ohg | Method for automatically initializing an indirectly measuring tire pressure monitoring system |
DE102008038579A1 (en) * | 2007-09-03 | 2009-03-05 | Continental Teves Ag & Co. Ohg | Method for indirect tire pressure monitoring and tire pressure monitoring system |
CN101492000B (en) * | 2008-01-22 | 2010-12-08 | 苏州驶安特汽车电子有限公司 | Tire pressure real-time monitoring method using tire pressure monitoring system |
US8350688B2 (en) * | 2010-03-01 | 2013-01-08 | International Truck Intellectual Property Company, Llc | System and method for indirect indication of tire pressure loss |
US8573045B2 (en) * | 2011-10-28 | 2013-11-05 | Infineon Technologies Ag | Indirect tire pressure monitoring systems and methods |
US20180154707A1 (en) * | 2016-12-05 | 2018-06-07 | The Goodyear Tire & Rubber Company | Indirect tire pressure and wear state estimation system and method |
CN114789629B (en) * | 2022-04-08 | 2024-06-21 | 摩登汽车有限公司 | Tire wear monitoring method and system |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE416919B (en) * | 1979-04-03 | 1981-02-16 | Brajnandan Sinha | DEVICE FOR INDICATING CHANGE IN PRESSURE IN VEHICLE TIRES |
GB9002925D0 (en) * | 1990-02-09 | 1990-04-04 | Sumitomo Rubber Ind | Method of detecting a deflated tyre on a vehicle |
US5591906A (en) * | 1992-09-16 | 1997-01-07 | Sumitomo Electric Industries, Ltd. | Tire pressure drop detecting device and method |
US5710539A (en) * | 1993-12-07 | 1998-01-20 | Sumitomo Electric Industrties, Ltd. | Tire air-pressure reduction detecting apparatus |
DE19723037A1 (en) * | 1996-06-07 | 1997-12-18 | Volkswagen Ag | Tyre pressure monitor based on stub axle vibration |
US5721528A (en) * | 1996-12-23 | 1998-02-24 | Ford Global Technologies, Inc. | Low tire warning system |
DE19721480A1 (en) * | 1997-05-23 | 1998-11-26 | Itt Mfg Enterprises Inc | Process for the detection of pressure losses in vehicle tires |
FR2764241B1 (en) * | 1997-06-10 | 1999-08-20 | Dassault Electronique | MONITORING A TIRE BY ACCELERATION MEASURE |
DE19803386A1 (en) * | 1998-01-29 | 1999-08-05 | Daimler Chrysler Ag | Device for monitoring the air pressure of a vehicle tire |
DE19908701B4 (en) * | 1999-02-26 | 2005-04-14 | Continental Teves Ag & Co. Ohg | Method and device for determining the run-flat condition of a pneumatic tire |
US6763288B2 (en) * | 1999-07-30 | 2004-07-13 | Pirelli Pneumatici S.P.A. | Method and system for monitoring and/or controlling behavior of a vehicle by measuring deformations of its tires |
WO2001043996A2 (en) * | 1999-12-15 | 2001-06-21 | Continental Aktiengesellschaft | Method and device for detecting a pressure loss in the tires of a motor vehicle |
US6285280B1 (en) * | 2000-06-26 | 2001-09-04 | Robert Bosch Corporation | Method for detecting a deflated tire on a vehicle |
DE10294624D2 (en) * | 2001-10-05 | 2004-07-29 | Continental Teves Ag & Co Ohg | Device for the combined detection of the axis acceleration and the wheel speed as well as pressure determination method |
US6725136B2 (en) * | 2002-04-01 | 2004-04-20 | Robert Bosch Gmbh | Tire pressure and parameter monitoring system and method using accelerometers |
-
2003
- 2003-12-10 US US10/538,952 patent/US20060220811A1/en not_active Abandoned
- 2003-12-10 DE DE50307910T patent/DE50307910D1/en not_active Expired - Lifetime
- 2003-12-10 EP EP03789198A patent/EP1575790B1/en not_active Expired - Lifetime
- 2003-12-10 WO PCT/EP2003/013987 patent/WO2004054824A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2004054824A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2004054824A1 (en) | 2004-07-01 |
EP1575790B1 (en) | 2007-08-08 |
DE50307910D1 (en) | 2007-09-20 |
US20060220811A1 (en) | 2006-10-05 |
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